How to make an ATM10 To the Sky server

1What an ATM10 To the Sky server needs

What ATM10 To the Sky needs on a server

Pack version	2.0.6, released 21 Sep 2026
Minecraft	1.21.1
Loader	NeoForge 21.1.250
Java	21
Memory	11 GB, as Playkeeper suggests it
Mods on the server	316
Download	533 MB
Server files	ATM10SKY-2.0.6-server.zip, 477 MB
From	CurseForge, by ATMTeam, 3.4M downloads
Checked	28 Sep 2026, on CurseForge and with Playkeeper 0.4.4's install plan

ATM's team ships fixes in bursts: 2.0.3 on 9 Sep, 2.0.4 on 11 Sep, then 2.0.5 and 2.0.6 on 21 Sep. Every player needs the server's version.

On 28 Sep, a server created from its template on the published 0.4.4 was online 1 minute 42 seconds after Create, with the 533 MB download. Its log said Done (5.906s)!, a timer that starts after the mods have loaded.

2The world is an island in the void

To the Sky is All the Mods 10's machines and magic on a skyblock start. The world comes from Skyblock Builder, one of its 316 mods, through the world type server.properties names: level-type=skyblockbuilder:skyblock. ATM's start script writes that line on a new server.

• A Playkeeper server gets it too. On the 28 Sep server, server.properties named Skyblock Builder's world type, the pack's seven starting islands loaded, like Simple Life and Witch Cottage, and the area around spawn was ready in 26 ms.
• Settings says Normal. Playkeeper's world type setting lists only Minecraft's own four, so it shows Normal for this world. The file on the Files tab is what the server uses.

3How much memory ATM10 To the Sky needs

The pack's CurseForge file asks Java for 8 GB. NeoForge and 316 mods take memory outside the heap, so Playkeeper suggests 11 GB, of which Java gets 8.1 GB, and the template rounds it up to 12 GB.

• ATM's server files set no heap. Their user_jvm_args.txt has -Xmx4G commented out, so Java takes a quarter of the machine's memory. In an 11 GB container that was 2.75 GB, and the server still started with nobody on.
• For 5 or more friends, the sizing guide gives a big modpack 24 GB.

4The one-click way

Playkeeper runs your server on a VPS you rent. Install it with one command:

1. 1

   Open the template below, or search New server › A modpack

   Either way it's ATM10 To the Sky 2.0.6 from CurseForge, with NeoForge and the memory it needs.

2. 2

   Create and start it

   Playkeeper downloads the pack's 533 MB, checking each file against CurseForge's hash. The server gets the 316 mods ATM's server files have, and nothing is left to add.

3. 3

   Let players fly

   Set allow-flight=true in server.properties on the Files tab, as ATM's script does, then restart.

5By hand, with ATM's server files

Download ATM10SKY-2.0.6-server.zip (477 MB, 316 mods) from the pack's files on CurseForge. Its startserver.sh installs NeoForge 21.1.250 the first time it runs.

# Java 21, then the server files in ./atm10sky
sudo apt install -y openjdk-21-jre-headless unzip
unzip ATM10SKY-2.0.6-server.zip -d atm10sky && cd atm10sky
echo "eula=true" > eula.txt
sed -i 's/^# -Xmx4G$/-Xmx8G/' user_jvm_args.txt   # the heap the pack asks for
ATM10_RESTART=false sh startserver.sh   # installs NeoForge, then starts

• Set the heap with sed, not echo >>: the file has no line break at its end, so an added line joins the comment above it and does nothing.
• It ran on 28 Sep in a Java 21 container: the script installed NeoForge, wrote server.properties, and the server said Done with its 8 GB heap.
• Restarts: the script starts the server again 10 seconds after it stops, unless ATM10_RESTART is false. ATM10_JAVA picks another Java, and anything older than 21 stops with "Minecraft 1.21 requires Java 21".
• Open TCP 25565 in your provider's firewall.

6What ATM's script writes to server.properties

On a new server it writes four lines. A Playkeeper server has the same world type, and Playkeeper's own values for the rest:

7Friends play the same version

Each friend installs All the Mods 10: To the Sky 2.0.6 in the CurseForge app or Prism Launcher, then joins your server's address.

Share with friends, on the server's Mods tab, makes them a page with the pack's version and their launcher's steps.